Chris Walshie from the ChevronWP7 team has released a tutorial for removing the registry keys which tells HTC devices they should wait for carrier approval before offering you the NoDo update.

While the instructions are relatively simple it does require having a developer unlocked device. The process for me was unexpectedly difficult at every stage of the way, and still resulted in my HTC 7 Trophy saying build 7008 is the latest, and that there is no update available, so I am not so sure it is worth the effort.